Improvement in steam-boilers



M. W.- SHAPLEY.

Steam-Boilers.

Patented Feb. 10,1874.

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MARTIN w. SHAPLEY, or zernennn'ron, new YORK.

IMPROVEMENT IN STEAM"BOILERS.

Specification forming part of Letters Patent No. 147,437, dated February10, 1874; application filed J annary 16, 1874.

' .tubes, connected by a chamber formed by an outside jacket, in such amanner that the heat and smoke shall pass from the upper end of thefire-box into said chamber, and descend through the vertical tubes intothe flue below; also, in combination with the same, a vertical tube orchamber for the receptacle and automatic supply of feed, when required,the object of the invention being to economize as much fire-surface aspossible to facilitate the cleaning and repairing of the parts, and todiminish the expense of manufacturing.

Figure 1 in the accompanying drawing is a view of a boiler embodying myinvention. Fig. 2 is a perspective view of the same, with the jacket andtube for the receptacle of fuel removed, showing the ends of thehorizontal and vertical tubes. Fig. 3 is a vertical transverse sectionillustrating the conical firebox,

' the position of the tubes, and by the vertical dotted lines the tubeor chamber for the receptacle of fuel. Fig. 4 is a plan of the basewhich supports the boiler, showing the firegrate and lower fines. Fig. 5is the jacket detached, showing the manner of connecting the twosections. Fig. 6 is a view, showing the lower end of the boiler, and theends of the vertical tubes.

A is the boiler, the upper part of which is made smaller than thediameter of the body of the boiler, which leaves a space, b, between thetwo cylinders for the jacket B, which is made in two sections, andsecured in position by screw-bolts c c, or otherwise fastened, as shownby Fig. 5, which jacket is fitted to the rim or edge d of the body ofthe boiler, and made to clasp the upper compartment a, which forms aconnecting-chamber, c e, for the passage of heat and smoke. O is thefire-box, which is made in a conical form to allow of sufficientwater-space at the connection of the upper and lower compartments of theboiler. D D are the horizontal tubes, which pass through the shell ofthe upper compartment of the boiler. These tubes connect, by means ofthe jacket-chamber c, with the vertical tubes E E, which are placedbetween the fire-box Q and the exterior plate of the body of the boiler,and connect with the flue f in the base F, on which the boiler issupported, and retained in position by closing the end, shown by Fig. 6,upon the flange g, which allows of its ready removal for cleaning orrepairs. G is the tube or chamber for the receptacle and automaticsupply of fuel. Its position is shown by the vertical dotted lines h h.This arrangement may be dispensed with, and the upper compartment a leftto its full capacity for water and steam, as shown by the dotted lineacross the opening for the tube Gr.

I claim as my invention The combination, with the boiler A and jacket B,of fire-box 0, horizontal tubes 1), vertical tubes E, base F, and tubefor receptacle of fuel G, all constructed substantially as hereindescribed, for the purpose set forth.

MARTIN XV. SHAPLEY.

WVitnesses WM. M. GRosBY, J. 0. Boris

